LG S5000 Service Manual page 81

4. TROUBLE SHOOTING
Checking Flow
START
Resolder J201
Does the audio
profile of the phone
change to the
earphone mode?
YES
Set the audio part of the test
Equipment to echo mode
Can you hear your
voice from
the earphone?
YES
Earphone will work properly
NO
Level at pin1
of U201 is high
YES
Change the earphone
and try again
NO
Can you hear your
voice from
the earphone?
YES
Change earphone
YES
- 82 -
NO
Replace U201
Resolder component
Set the audio part of
the test equipment to
PRBS or continuous
wave mode
No
Can you hear
the sound from
the earphone?
YES
Download software.
Does it work well?
NO
Change the main board.
Download software
Voltage at
C209
=1.2V ?
YES
Check soldering
C209
R209
YES
Change the main board.